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  1. U

    Math help please

    Hello, i need help trying to solve these problems, dont understand how to arrive to answers... thak you very much in advance.. Solve- 1)4x^2+9y^2-16x+18y-11=0 2) y^2= -20x vertex foci 3) Sin^2x-sinx= 0
  2. U

    Differential Equation: (2y^2 + 5x)dx + 3xy dy = 0

    I have this problem i cant seem to solve. I have no clue where to start. (2y^2+5x)dx+3xydy=0 solve. thanks
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